Update twine to 1.9.1

[pyup-bot]

There's a new version of twine available.
You are currently using 1.9.0. I have updated it to 1.9.1

These links might come in handy: PyPI | Changelog | Repo

Changelog

1.9.1

• Blacklist known bad versions of Requests. See also 🐛253

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[codecov-io]

Codecov Report

Merging #1928 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1928   +/-   ##
=======================================
  Coverage   97.05%   97.05%           
=======================================
  Files          37       37           
  Lines        7610     7610           
  Branches     1328     1328           
=======================================
  Hits         7386     7386           
  Misses        101      101           
  Partials      123      123

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